Re: [ferret_users] regrid problem

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Zibiao,
Are you seeing that error message when you go to look at the variable 
temperature in your new file test.nc? I am guessing that you do the 
commands you are listing, and then if you gave commands to use 
temperature, something like

use test.nc
shade/k=1 temperature

then you would see that error, because now the default dataset is 
test.nc, and Ferret sees the old definition of variable "temperature = 
temp[g=grd]" and cannot access temp. That is when you would see this 
error. The solution is  to cancel the original dataset, (or cancel the 
variable definitions used to write the new dataset) and then it will all 
work fine.

...
list/clobber/file=test.nc/format="CDF" temperature
cancel data/all
cancel variable/all

use test.nc
shade/k=1 temperature 


Ansley

Zibiao Zhang wrote:
> Dear all,
>
> I have a data file I called 3d_ave.nc has the grid as following:
>
> Grid GGR1
> Longitude200_450 	longitud 	251mi	82.08W(-82.08)	62.08W(-62.08)
> Latitude800_1050	Latitude		251   i	32.838N	47.96N
> Depth_1-		Depth(m)	10     i-	0		200
> normal 			T
>
> I'd like to resample the data point to 81x81, instead of the original
> 251x251.
> I used the following scripts:
>
> can data/all;
> use 3d_ave
> def axis/x=82.08w:62.08w:0.25 xax;
> def axis/y=32.83n:47.96n:0.19 yax;
> def grid/x=xax/y=yax grd
> let temperature=temp[g=grd]	! temp is the varialbe in file 3d_ave
> list temperature
> list/clobber/file=test.nc/format="CDF" temperature
>
> the result from "list temperature" looks fine, however when I save to the
> file test.nc, and list the temperature from the file, it has error:
>
> ** ERROR: variable unknown or not in data set: TEMP[G=grd]
>
> Can you tell me what is the problem?
>
> thank you very much,
> Zibiao
>
>   

--

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Ansley Manke, NOAA/PMEL   ansley.b.manke@xxxxxxxx
7600 Sand Point Way NE, Seattle WA
Phone 206-526-6246,  FAX 206-526-6744